Criticism of Tkachuk as captain isn't based on one single factor, its a multitude of factors that he doesn't meet. I'm calling your post disingenuous because the way its written makes it seem as though criticism of him is fickle or something random or shallow. It's not calling for him to be traded right now because of some vendetta, it's commenting on how the C feels rushed for him.
Brady leads the team in points during a rebuild with 45 and 36 points, which on paper is fantastic for a young forward. When you take a step back and see how he fared in comparison to his peers, it's not like he dominated offensively or established himself as anything extraordinary. Even the 'leader on and off the ice'. He was/is a popular name, is loud and recognizable, but aside from having an A, it is hard to even measure how anyone can be a leader 3 seasons into their career. We are severely overrating his start to his career here.
Look at when Alfie sat out and when Brady sat out. Our management was notorious for underpaying performing players. Look at what Alfie was demanding considering what was happening with Yashin, management had set a precedent of allowing players to sit out because of them previously readjusting salaries for players (look at Yashin and Daigle). When Alfie got the C, it was because some of his on-ice play and hardware warranted it some semblance of consideration, on top of Yashin being a dick.
When it comes to on-ice play, history in the league, and comparison to his peers, when you look at the C being given to Brady, it's such a weak case.
I personally wanted Chabot as captain, but I acknowledge I would've been wrong. Chabot and Brady were just more tenured than any other candidate, but both were bad options. They should have just rolled with 3 A's the way the Leafs did with their young guys, and let the season roll out after a roster with some more established NHL presence (Cat and Giroux) and then hand it out.
And no, I'm not turning on Brady. Yes, I wanted other players over him on draft day but I've happily eaten crow watching him grow, but never wanted him as C and will critique him like I do every other player. I'm too young to even remember the Alfie vs Conroy lmao as I only watched games and didn;t have internet at the time.